Christine Heppermann Books

Poisoned apples

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Cruelties come not just from wicked stepmothers, but also from ourselves. There are expectations, pressures, judgment, and criticism. Self-doubt and self-confidence. But there are also friends, and...

Sadie's story

By Christine Heppermann

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Feeling bored and left out after her friends depart for vacation, Sadie discovers that a witch has moved into her playhouse and is willing to share with Sadie the magical world of birdwatching.

Sadie's Story

By Ron Koertge, Deborah Marcero, Christine Heppermann

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Jess's story

By Christine Heppermann

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Jess is a superstar on the field and on the court. Soccer, basketball, baseball, tennis you name it, she loves it. But she s a disaster in the kitchen, much to the dismay of her chef mother. When J...

Jess's Story

By Ron Koertge, Deborah Marcero, Christine Heppermann

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Maya's Story

By Ron Koertge, Deborah Marcero, Christine Heppermann

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Maya's Story Backyard Witch Book 3

By Ron Koertge, Christine Heppermann

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What Goes Up

By Christine Heppermann

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Samurai

By Christine Heppermann

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Samurai

By Christine Heppermann

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.